Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aafb49be0bbf45e…

MALICIOUS

PDF

41.4 KB Created: 2020-03-22 07:28:30 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4bbb0298fe2ae04c75b3ab5be493bf2b SHA-1: a4de79e454039afbd288de7e8c0eb668a6c7fda0 SHA-256: 0aafb49be0bbf45ed595c71f5d6066bf271fb90631c38cea2b271fe53c428ab9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a mass external link farm. While no scripts were explicitly extracted, the presence of numerous URLs suggests an attempt to lead the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://cinderellascleaningcompany.com/uploads/1/3/0/5/130541656/130541656.html#convert+mm2+into+cm2
    • http://www.kellydaydreamer.com/uploads/1/3/0/8/130874615/4bd97ff7.pdf
    • http://www.bringontheagame.com/uploads/1/3/0/7/130739947/6262f154a.pdf
    • http://rayspavinganddrainage.com/uploads/1/3/0/5/130543511/7683237.pdf
    • http://mail.handball-westerholt.de/uploads/1/3/0/6/130605112/5881bfaf1d7dc3.pdf
    • http://cnmsf.org/uploads/1/3/0/2/130287984/1965918.pdf
    • http://kidsaap.net/uploads/1/3/0/9/130969759/1044293.pdf
    • http://robotics.team/uploads/1/3/0/7/130740145/gadanutejivovap.pdf
    • http://www.gardenersguru.com/uploads/1/3/0/5/130551491/c03848.pdf
    • http://www.sunnysidepools.ca/uploads/1/3/0/7/130739326/876c72b6c0.pdf
    • http://www.introvertssquaredshop.com/uploads/1/3/0/5/130543154/2666601.pdf
    • http://horshamfluttergrubs.com/uploads/1/3/0/7/130776073/rulonakutuwi.pdf
    • http://www.thevivaciouslivingcompany.com/uploads/1/3/0/7/130739686/1545378.pdf
    • http://martialarts-center.com/uploads/1/3/0/6/130604620/5bc8a.pdf
    • http://choiceupholstery.net/uploads/1/3/1/0/131070452/sopufasapad.pdf
    • http://kirajoelle.com/uploads/1/3/0/4/130483911/kajijo.pdf
    • http://getplantpower.com/uploads/1/3/0/2/130289755/196234.pdf
    • http://sova1.com/uploads/1/3/0/5/130588343/jomakiwefowuv-jewew.pdf
    • http://www.ultimatemotorsports.org/uploads/1/3/0/8/130874365/dijub.pdf
    • http://www.myfancysport.com/uploads/1/3/0/7/130776077/8121245.pdf
    • http://ds4all.tech/uploads/1/3/0/6/130622007/nufabakupenunud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d91.bin
019204bb40f201e11ec8540390a7f17d6a7272a704ad61d9e537374f272be69a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D91 8112 bytes
font_01_sfnt_off00008cec.bin
cf2338b7895a3a873add1db7dfb411390262a2a3d24e5b3dccff59843624ea97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CEC 2704 bytes

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